上次玩猜谜，老师说，这是小东西，每个人都有，上面有数字，答案是手机
因为手机是每个人都有的东西，所以我想补充些手机的常识，和大家讨论讨论。
1紧急救援号码：全世界的手机都可以拨打的共同紧急救援号码是112。即使你所在的地区无手机信号覆盖，也可以拨打112。
2不要等到没电才充电：现在的手机大部分都用锂电池，若等到全部将电用完后再充，会使锂电池内部的化学物质无法反应而减少寿命。最好的方法就是没事时就充电，让它随时保持最佳满格状态。
3充电时请勿接电话：手机在充电时，来电接听会有潜在的危险。
4手机信号剩一格时不要使用：手机的设计为了在信号较差的地区仍能保有相当的通话质量，会加强手机的电磁波发射强度，当信号满格与只剩一格时相比，发射强度竟然相差1000倍以上，电磁波强度高达0。6W(瓦特)。
5如果你是中国移动的用户，键入数字“0000”，发送短信至10086，数秒钟内将自动回复一条短信列表，显示您的手机上究竟定制了哪些短信服务
6如果您的手机进水了，请切记不要做任何按键动作，尤其是关机，（一按任何键，水马上会跟着电路板流串）。应该马上打开外盖，直接将电池拿下，直接强迫断电，可保住机板不被水侵蚀。
7手机打电话时候，0秒到55秒算1分钟的钱，0秒到1分55秒算2分钟的钱，0秒到2分55秒算3分钟的钱，依此类推。
移动手机，在上海办理的手机卡，在上海拨打电话,发短信给10086都不收费。

Last time we were playing puzzles, my teacher said that this is a small thing everyone has and there are numbers on it, the answer is cell phone
Considering that cell phones are something everyone has, so I wouldlike to tell more about cell phones and have a discussion with everyone.
1.Emergency number: the world's all mobile phones can dial a commonemergency number 112. Even if your position is out of cell phone coverage area, you can also dial 112.

2.Do not charge your cell phone until it has no electricity: most of mobile phones use lithium batteries. That you charge your phone just after all the electricity used up will make internal lithium battery stop achemical reaction,which will reduce its lifeyime. The best way is to charge your phone before electricity is exhausted. Just keep your phone in a status of full electricity at any time.
3 Do not charge your phone: during your mobile phone being charged, answering calls would be potentially dangerous.

Do not use your phone when cell phone signal is smallest: In order to ensure better call quality even in a poorer signal coverage area,mobile phone is designed to strengthen electromagnetic emission intensity, the difference of emission intensity between the biggest and the smallest cell signal should be up to more than 1000 times, electromagnetic intensity as high as 0.6W (watts).

5 If you are a China Mobile user, input number "0000", send text messages to 10086, in a few seconds, a list of messages will be automatically returned to show how much customized short message service your mobile phone has.
6 If you drop your cell phone in water, please remember not to press any key, especially the shutdown, (once any key has been pressed, the water will immediately penetrate into the circuit board). The correct way is to quikly open the outer cover , unload the battery till force the power to be off,thus can keep the circuit board not to be eroded by water.
7 Calculation of call time, one minute fee is charged for 0 seconds to 55 seconds, two minute fee is charged for 0 seconds to 1 minute 55 seconds, three minute fee is charged for 0 seconds to 2 minutes and 55 seconds, and so on.
For mobile phones, if you handle mobile phone cards in Shanghai, making calls or sending text messages to 10086 are not charged.